Design of the Sperry Mk XIV Gyro-Compass

[@flankerchan]

The way this film explaining stuff is very clear without use of buzzwords etc. I really want to be able to explain things the way this video is narrated.

[@tombrozt]

This clearly has months of work and preparation behind, you cannot expect to make a live presentation this quality.

[@alext8828]

@@tombrozt There is no "try". Only "do" or "not do".

[@MarcCastellsBallesta]

@@alext8828 A quote I'll never forget from Yoda.

[@alext8828]

@@MarcCastellsBallesta Me too.

[@joelima201]

Rebuilt many Japanese made Sperry SR-120 marine navigational gyros for a living. Lots of similarities between the MK 14 and the 120. Used steel ball bearings years ago , it was good for about 2 years of non-stop running .Then ceramic bearings and synthetic grease came out , went for 4 years , running at about 12, 000 rpm. Then the Anshultz gyros came on the scene and then changed everything !

[@grommel5693]

I do not understand why the mercury is needed Can someone explain this?

[@zombiewoof5257]

I've been looking for this video, thanks for reposting it.

[@ajpt4336]

Previously, ship navigators relied on the magnetic compass to determine the required directions by calculating the ship's course error rate because the magnetic compass index deviates from the effect of the magnetic pole and not the real one, and both poles are not identical, so navigators were constantly correcting the direction of ships, but after the industrial development of ships The effects of the side magnetic fields on the magnetic compass increased, so that it became difficult for the navigator to calculate the correct direction of the ship, so scientists later invented the compass gyroscope, that works by mechanical effects only, which is the moment of inertia of the gyroscope as well as the speed of the Earth’s rotation and gravity so that it is not affected by magnetic fields at all. The compass hand points to the true pole along the meridian with a slight error rate according to the ship's direction, speed, and position.

[@leonardopinhel1219]

beautiful engineering

[@rosewhite---]

but why does the rotor align itself north/south?

[@DarkStar666]

Because Earth's movement creates a small force because it is trying to turn the spinning gyroscope, that force is then detected by the electronics and used to align the spin. Once the gyroscope is aligned to Earth's axis then the only force is around the direction it is already spinning so there is no force deflecting that axis of spin. If you hold a pretty decent gyroscope at an angle and try to spin around you can feel it, it'll rip it out of your hands if you aren't careful. The converse is true also, if you try to turn the gyroscope it will turn YOU, especially if you are sitting on a chair that can spin around. You can find videos of people doing just that.

[@boosomentity]

would I be right in assuming the sensitive element is working independently of the rest of the mechanism and is being drawn to magnetic north?

[@diemos09]

Yes, but it has nothing to do with magnetic north. It aligns with true north, the earth's rotational axis.

[@DarkStar666]

Hold a pretty decent gyroscope at an angle and try to turn around, you will feel a pretty strong force fighting you. Then hold it vertically, and turn around, it won't "fight" you when the two axes are aligned. That is exactly the force used to align the gyroscope to Earth's rotational axis. Now that is a fairly heavy (massive) and fast spinning gyro so that it will be sensitive enough to detect Earth's fairly slow rotation rate being just once in 24 hours (half the speed of an hour hand on a clock). Now days they use rotating laser light to build extremely sensitive instruments that can detect even smaller rotational motions, but these gyrocompasses are still used at sea. DEFINITELY not magnetic -- they were placed deep inside giant metal ships with all kinds of electromagnetic interference around them.

[@theplanetruth]

Is there a part two? The show notes mention earth rotation and true north, but this video says NOTHING about those issues. Is there a video that addresses this issue?

[@IBHunter]

There are several videos that explain the operation of gyrocompasses. What issues are you looking to have explained?

[@IBHunter]

@@klam77 Not exactly. Most navigational maps are based on true north and give you a magnetic declination incase you are using a magnetic compass. The marine gyrocompasses output a heading like a magnetic compass but do not point to magnetic north, only true north, and are not affected by metal, magnets or electric currents. Also they are not affected by the movement of the magnetic poles over time. The rotational axis stays the same.

[@eatcommies1375]

This was before the ceramic bearings technology?

[@tanja8907]

Yes, they used frozen peas.

[@bestamerica]

' gryocompass is only 3 axles... can try 4 axles or 5 axles... would work better running or not

[@stanleycates1972]

fascinating

[@grommel5693]

I do not understand why the mercury is needed Can someone explain this?

[@MarcCastellsBallesta]

It's there to balance the effects of gravity on the gyrocompass. Mercury acts as an element to constantly know which direction is down.

[@maysammirzakhalili4862]

Oh, it's amazing an I don't know anything about it in 2021!!!

[@RahulSharma-lw3ei]

Best Ever

[@malakiblunt]

"THE PHANTOM ELEMENT"

[@emojiconlentes6134]

Hermoso mecanisco giroscopico lo amé😊🥰😍🤩🤗

[@FlatEarthMath]

The best word in the script: "Athwartship" :-) So, Mr. Dark Star, are you trying to tell me that the Sperry Mk XIV gyro compass isn't just a toy gyroscope with one motor? Because those toys prove the Earth isn't moving, you know. ;-)

[@DarkStar666]

That would be my claim, yes ;) My challenge to the intellectually challenged Flat Earthers would be to prove me wrong by showing #1 how they measured the frictional resistance of their toy gyro ("moves easily" is not an actual measurement), and #2 showing me their calculations of the expected force acting on their gyro in whatever configuration they choose. If #2 is smaller than #1 then they haven't demonstrated anything. If they cannot show what is or would be EXPECTED, then they also haven't demonstrated anything. Thanks for asking! I wanted to get that out there :) Will be doing a blog post on it eventually I'm sure.

[@GarrettFogerlie]

Dark Star math is fake, unless it supports the flat earth, then it magically becomes real. Shocking that no one answered your question. I’d think flat earthers would have an answer since they have so much evidence backing all their claims. They certainly wouldn’t assert something without providing the evidence to back it up.

[@tomasreynoso1161]

That's right brother!. Liquids doesn't transfer shear stress between layers, only friction, so it's an intrinsic property of fluids not to curve, regardless of "gravity" (which is still been a theory, there are "laws of Newton" but theory of gravity), atmosphere (compresible fluid air) push water (incompressible) because of density, so air distributes pressure and maintain an absolut level of water and pressure on its surface.

[@project_nihilist]

Flat Earth Math this is a video of how a real life gyro compass works not so much about the principals behind why they work. You can’t possibly expect us to think that a toy is going to show this to us. Maybe you need to watch Bob on the “behind the curve” with his famous laser gyro showing a 15 deg/hr drift

[@tomasreynoso1161]

@@project_nihilist Relativity it's still a theory. Research which company produced that documental and you will see their intentions. Watch ISS actornauts having troubles with harness, you can hear servo-motors stopping and their movements being locked. Explain me how after 6 months on a supposed "eliptical orbit" you see the same stars and you don't have a 12 hours movement of time (the sun would be at the other direction from earth). Water does not curve (watch Panama's channel). All fluids needs a container to be presurized.

[@cemoguz2786]

Ok I have to tell you something. It is kind of silly but I will tell you anyway. I was looking to find true north precisely because I am interested in astrophotogrph and I can not polaris for polar alliament and magnetic compass is not working because my spot is my balkony and there is weard magnetic bhavior worse then most and my father is captain he told me about this one time shortly and I remember that search it on google and youtube. When I see your profile pic I got excited and thought to my self oh this is common on this hoby. When I see you are sharing alot more tecnical stuff. I got sad. It was a emotional rollar coster.

[@DivergentDroid]

Dark Star. I caught a glimpse of a comment you made on another channel but i didn't catch it all. I want you to tell me, you said the formula most Flat Earthers use for the curvature of 8 inches per mile squared, isn't the correct formula to use. I'm not here to argue the earth is Flat with you, I just want to know this alternate formula and why it's right and the other one wrong. I want to understand this. When I started researching the earth's shape and heard of the 8 inches per mile squared formula, I had previously seen it from a professional photographers site so it made sense to me. I couldn't believe the earth was flat, so I maintained the formula Must be wrong, but I never got any alternative formulas. No one knew of any. Perhaps now, you can give me one. Thanks. (I currently believe the earth is only flat in as much as we have trouble measuring a curve locally to the extent or eyes can see. (and it really look so if you compare what we observe to the 8 inches per mile squared notion) I'm not sold on the entire planet being flat like a pancake or that we live on an Earth based on the Azimuthal Equidistant model.. this is why I consider myself an Earth Researcher, not a flat earther.)

[@DarkStar666]

It's detailed in my blog: flatearthinsanity.blogspot.com/2016/08/flat-earth-follies-how-to-derive-8-per.html this is 'ok' up to about 100 miles if you don't need pinpoint accuracy. The 'right' formula is to actually measure it directly to whatever level of accuracy you require using modern survey techniques. Most people are not aware but there is a nearly 180 meter difference in the ocean level due to gravitational shifts. These are over very vast distances and this shape is NOT like going up a hill - this is caused by the gravitational equipotential actually being different so a ship would not notice any change - they are merely an extra 180 meters from the center of the Earth but feeling the exact same gravity. Second to that you can use the latest Geoid model data and approximate it, usually to within about 1 meter. You get something close to that with Google Earth. Below that using en.m.wikipedia.org/wiki/Vincenty's_formulae to approximate just the ellipsoid. Below that is using a spherical approximation - which is probably fine for up to maybe 200 miles - again, if you don't care about pinpoint accuracy. This is my post on that: flatearthinsanity.blogspot.com/2016/07/derivation-for-height-of-distant.html This is what my calculator is based on although I plan to add an ellipsoid mode. My calculator: flatearthinsanity.blogspot.com/p/fei-horizon-calculator.html Hopefully all of that is helpful in some way.

[@DivergentDroid]

That's gonna take me a while to work through, but hey, Thank you. It's much appreciated.

[@DarkStar666]

Divergent Droid of course - feel free to ask more questions. The short answer is that for naked eye observations over distances under 100 miles any of these are acceptable approximations.

[@tomasreynoso1161]

That's right brother, liquids doesn't transfer shear stress between layers, only friction, so it's an intrinsic property of fluids not to curve, regardless of "gravity" (which is still been a theory, there are "laws of Newton" but theory of gravity), atmosphere (compresible fluid air) push water (incompressible) because of density, so air distributes pressure and maintain an absolut level of water and pressure on its surface.

[@project_nihilist]

Ftards make this claim like it was etched it stone a long time ago. It is a useless formula that makes a parabola. There are better equations that they could use but it requires too much of the math that no ftard wants to learn. It does have some accuracy for the shorter the distance , the farther you go the less accurate it gets. Similar to all ftard thinking

[@batchint]

this compuss could be compared to a tesla motor... on basic principles

[@olegpopov7860]

Не магнитный компас? На вращении земли? Да ну!

[@the_borys]

Pozdrawiam 2aL

[@markanthonytapia4847]

i have one of this,,,i will sell it,,, who want???

[@lk9650]

The earth is flat so it's useless.

[@awatt]

It works so obviously the world is a rotating sphere. Globe confirmed 🌎

[@timetraveler7]

Weird that this thing works then and is actually prefered to magnetic compasses on large ships.